Aspect Ratio Calculator

An aspect ratio calculator is a tool that calculates the proportional relationship between the width and height of an image or video. The aspect ratio is expressed as two numbers separated by a colon (e.g., 16:9, 4:3), representing the ratio of width to height.

Our free aspect ratio calculator allows you to calculate aspect ratios from dimensions, find matching dimensions from a known aspect ratio, and use common presets for different media formats. This is essential for web design, video production, photography, and responsive design.

Why Calculate Aspect Ratios?

• Responsive Design: Maintain proper proportions across different screen sizes
• Video Production: Ensure videos match standard aspect ratios for different platforms
• Image Cropping: Calculate dimensions when cropping images to specific ratios
• Web Development: Set proper image dimensions for optimal display
• Social Media: Match aspect ratios required by different social platforms

Common Aspect Ratios:

• 16:9: Standard widescreen (HD, Full HD, 4K videos)
• 4:3: Traditional TV and computer monitor format
• 1:1: Square format (Instagram posts, profile pictures)
• 21:9: Ultra-wide format (cinematic videos)
• 9:16: Vertical format (mobile videos, Instagram Stories)

Aspect ratio is the proportional relationship between the width and height of an image or video. It's expressed as two numbers separated by a colon (e.g., 16:9).

Common Aspect Ratios:

• 16:9 - Widescreen (HD, Full HD, 4K videos)
• 4:3 - Traditional TV and computer monitors
• 1:1 - Square (Instagram posts)
• 21:9 - Ultra-wide displays
• 9:16 - Vertical/Portrait (Stories, TikTok)